linux/drivers/usb
Johan Hovold cb25505fc6 USB: cdc-acm: fix device unregistration
Unregister tty device in disconnect as is required by the USB stack.

By deferring unregistration to when the last tty reference is dropped,
the parent interface device can get unregistered before the child
resulting in broken hotplug events being generated when the tty is
finally closed:

KERNEL[2290.798128] remove   /devices/pci0000:00/0000:00:1d.7/usb2/2-1/2-1:3.1 (usb)
KERNEL[2290.804589] remove   /devices/pci0000:00/0000:00:1d.7/usb2/2-1 (usb)
KERNEL[2294.554799] remove   /2-1:3.1/tty/ttyACM0 (tty)

The driver must deal with tty callbacks after disconnect by checking the
disconnected flag. Specifically, further opens must be prevented and
this is already implemented.

Cc: stable <stable@vger.kernel.org>
Cc: Oliver Neukum <oneukum@suse.de>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-21 15:59:01 -07:00
..
atm Merge branch 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq 2012-10-02 09:54:49 -07:00
c67x00 usb: c67x00 RetryCnt value in c67x00 TD should be 3 2013-03-07 12:31:37 +08:00
chipidea usb: chipidea: register debugging sysfs on our device 2013-03-04 09:33:25 +02:00
class USB: cdc-acm: fix device unregistration 2013-03-21 15:59:01 -07:00
core USB: xhci: correctly enable interrupts 2013-03-15 12:07:53 -07:00
dwc3 usb: dwc3: ep0: fix sparc64 build 2013-03-08 09:42:50 +02:00
early fix build of EHCI debug port code when USB_CHIPIDEA but !USB_EHCI_HCD 2012-11-02 10:13:33 -07:00
gadget usb: fixes for v3.9-rc4 2013-03-21 08:40:22 -07:00
host USB: EHCI: fix regression in QH unlinking 2013-03-20 16:17:22 -07:00
image USB: mdc800.c: remove dbg() usage 2012-05-01 21:33:50 -07:00
misc USB: altsetting overrides for usbtest 2013-01-31 10:09:19 +01:00
mon mm: kill vma flag VM_RESERVED and mm->reserved_vm counter 2012-10-09 16:22:19 +09:00
musb usb: fixes for v3.9-rc4 2013-03-21 08:40:22 -07:00
otg usb: otg: use try_module_get in all usb_get_phy functions and add missing module_put 2013-03-04 09:33:30 +02:00
phy usb: phy: omap-control-usb: Convert to devm_ioremap_resource() 2013-03-04 13:08:53 +02:00
renesas_usbhs USB patches for 3.9-rc1 2013-02-21 12:20:00 -08:00
serial USB: quatech2: only write to the tty if the port is open. 2013-03-13 12:32:47 -07:00
storage usb-storage: add unusual_devs entry for Samsung YP-Z3 mp3 player 2013-03-15 12:07:53 -07:00
wusbcore USB: wusbcore/wa-xfer: error handling fixes in setup_segs() 2013-02-06 11:38:14 -08:00
Kconfig USB: select USB_ARCH_HAS_EHCI for MXS 2013-01-11 16:01:06 -08:00
Makefile usb: Makefile: fix drivers/usb/phy/ Makefile entry 2013-03-07 12:29:09 +08:00
README
usb-common.c
usb-skeleton.c USB: usb-skeleton.c: fix compilation error and restored kref_put on fail in skel_open 2012-10-24 14:40:50 -07:00

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("khubd").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.